Rearview Mirror Mounting Assembly With Self-Locking Rotation Shaft
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Solution Overview
Problem
Conventional wing mirror fixation assemblies for vehicles are complex, require multiple parts, and fail to achieve a secure and simple locking mechanism, leading to potential unwanted rotation and increased assembly costs.
Innovation Solution
A fixation assembly featuring a rotation shaft with a coupling base and a bracket that includes a groove for longitudinal stop and locking protuberances, preventing further rotation once the shaft is fixed, using a geometric match and elastic resistance to maintain the assembly position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fixation assemblies use multiple parts and complex mechanisms, then the locking reliability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the rotation shaft, coupling base, and locking mechanism into an integrated assembly. The coupling base is directly formed with locking protuberances that engage with recesses in the bracket, eliminating the need for separate locking components. This merging of functions into fewer parts reduces assembly complexity while maintaining reliable locking through the geometric interlocking of the protuberances and recesses.
Solution Approach 2:
The fixation assembly employs self-locking features where the geometric shape of the coupling base automatically engages with the bracket's recesses upon insertion. The locking protuberances on the coupling base passively secure the rotation shaft in place without requiring external locking mechanisms or additional fastening operations, allowing the assembly to lock itself during the insertion process.
2Ease of operation
If conventional fixation assemblies allow rotation during assembly, then the ease of assembly is improved, but the stability of the final position is worsened due to unwanted rotation
Solution Approach 1:
The coupling base is pre-formed with locking protuberances that are positioned to engage with corresponding recesses in the bracket at a specific angular orientation. During assembly, the rotation shaft is inserted into the bracket, and the protuberances automatically engage with the recesses at the correct position, pre-establishing the locked state before final assembly completion. This preliminary engagement ensures the mirror cannot rotate beyond the intended position.
Solution Approach 2:
The coupling base features an asymmetric geometric shape with locking protuberances positioned at specific angles relative to the rotation shaft axis. The bracket contains corresponding asymmetric recesses that only match the protuberances at one specific angular orientation. This asymmetric design allows easy insertion and rotation during assembly, but once the protuberances engage with the recesses, further rotation is mechanically blocked, ensuring stable final positioning.
Data Source
AI summary
This invention refers to a fixation assembly corresponding to the mounting structure of an wing mirror, where such mounting is carried out in such a way that one part of the fixation assembly, the mirror actuator, is mounted on another part of the assembly, which is the bracket that forms part of the mounting base of the said assembly, which is attached to the door/body of the vehicle by inserting the rotation shaft into the bracket, being able to rotate the base of said rotation shaft inside the bracket and making its fixed positioning at one point in its rotation and blocking the further rotation to prevent its exit from said fixed position.